Question

gasiti numerele naturale x pentru care a) x+2<3 b)15+x<16 c) 0<x+1<3. d) 10<5+x<13 repede dau coroana primul care răspunde

Answer 1

a) x+2<3
x<3-2
x<1
x<{1,2,3}
b) 15+x<16
x<15-16
×< -1
x<{-+1,-+2,-+3.......-+15}
c) 0<x+1<3
x<3-(0+1)
x<3-1
x<2
x<{1,2,3}
d)10<5+x<13
10+x<13+<5
10+x<18
x<18-10
x<8
x<{1,2,3,4,5,6........18}